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Find limx→0 f(x), where f(x)={x|x|x≠00x=0 - Mathematics

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प्रश्न

Find `lim_(x -> 0)` f(x), where `f(x) = {(x/|x|, x != 0),(0, x = 0):}`

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उत्तर

If x < 0, |x| = −x

∴ `lim_(x → 0^-) f(x) = lim_(x → 0^-) (x/|x|) = lim_(x → 0^-)(-x)/x = -1`

And if x > 0, |x| = x

∴ `lim_(x → 0^+) f(x) = lim_(x → 0^+) (x/|x|) = lim_(x → 0^+) x/x = 1`

∴ `lim_(x → 0^-) f(x) ≠ lim_(x → 0^+) f(x)`

Hence, the equation does not exist at x = 0.

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अध्याय 12: Limits and Derivatives - EXERCISE 12.1 [पृष्ठ २३८]

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एनसीईआरटी Mathematics [English] Class 11
अध्याय 12 Limits and Derivatives
EXERCISE 12.1 | Q 26. | पृष्ठ २३८

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